The trio had some fun in a photo booth during the weekend bash, and it's obvious Tristan has earned Nori's approval. Planting a big kiss on her cheek, North was all smiles next to the NBA star which Khloé proudly shared on her Snapchat.

(Photo Credit: Snapchat)

Tristan and North even snapped a pic without Aunt KoKo, proving they are officially BFFs.

Khloé “is madly in love with Tristan and wants to get married and have a family. But he hasn’t proposed yet, so Kim’s been pressuring him,” a source said. "Kim fears Khloé will lose Tristan if they don’t get engaged soon."

However, Khloé has made it very clear that the couple is ready to start a family together, revealing she was off birth control on a recent episode of the family's popular reality show.

"Tristan and I definitely talk about starting a family," the Strong Looks Better Naked author revealed. "Now knowing I'm not on birth control is just like — it's scary," she said. "It's like a really big step."

Tristan has also publicly proclaimed his love for the brunette beauty, sending her a heart melting message on social media for her birthday.

"Happy bday my love, this picture right here sums up how wild, crazy and how much we love each other," he wrote. "Let's continue to build more memories and cherish them with each other. God bless you, I love you."

For more cute photos of Khloé and Tristan, check out the gallery below!